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Shelly is certain that she knows all the material that will be covered on the upcoming exam,so she decides not to study.When she takes the exam,she realizes that she does not know all of the answers.Shelly fell victim to
Hemophilia
A hereditary disease in which blood does not clot properly; the forms known as hemophilia A (deficient for clotting factor VIII) and hemophilia B (deficient for clotting factor IX) exhibit an X-linked, recessive inheritance pattern.
Punnett Square
The grid structure, first developed by Reginald Punnett, that allows direct calculation of the probabilities of occurrence of all possible offspring of a genetic cross.
Sex Chromosomes
Chromosomes that determine the sex of an organism, with common configurations being XX for females and XY for males in many species.
XX Chromosomes
A pair of sex chromosomes that typically determines that an individual will develop female physical traits in humans.
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